Influence of Surface Contaminations on Cathode Processes of Vacuum Discharges
Influence of Surface Contaminations on Cathode Processes of Vacuum Discharges
复制标题
表面污染对真空放电阴极过程的影响
DOI：
10.1002/ctpp.19770170606
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发表时间：
1977
影响因子：
1.6
通讯作者：
H. Wolff
中科院分区：
文献类型：
--
作者：
J. Achtert;B. Altrichter;B. Juttner;P. Pech;H. Pursch;H. Reiner;W. Rohrbeck;P. Siemroth;H. Wolff
定性地讨论了表面污染对真空放电点火和维持的影响。电极的表面分析和放电过程中的气体分析表明，新鲜电极的上表层总是含有杂质，这会影响真空电弧和真空故障的行为。最有效的清洁表面的方法是放电本身，如果它们在特高压下燃烧。在清洗过程中，发现了以下变化：阴极斑点是否从快速移动的小侵蚀(类型1)转变为缓慢移动的强侵蚀(类型2)。纳秒放电的点火需要较高的场强和场发射电流密度。短放电(<；5 ns)的抛光效果变得更加明显。纳秒放电中的侵蚀坑增加。
The influence of surface contaminations on the ignition and maintenance of vacuum discharges is discussed qualitatively. Surface analysis of the electrodes and gas analysis during the discharges demonstrate that fresh electrodes contain always impurities within the upper surface layers, which affect the behaviour of vacuum arcs and vacuum breakdowns. The most effective way for cleaning the surfaces are the discharges themselves, if they burn in UHV. During that cleaning the following variations have been found: Are cathodes spots change from rapid moving ones with small erosion (type 1) to slow ones with strong erosion (type 2). The ignition of nanosecond discharges needs higher field strength and field emission current density. Polishing effects by short discharges (< 5 ns) become more pronounced. Erosion craters in nanosecond discharges increase.